" Three-body 3: Death's Eternal Life " was a science fiction novel by Liu Cixin, the third part of the " Three-body " trilogy. The story of the novel took place after the contact between the humans on Earth and the alien civilization. With the help of the Three-Body People, the humans on Earth discovered the true face of the alien civilization and fell into an all-out war with the Three-Body People. In the war, the humans on Earth faced an unprecedented crisis and discovered the weaknesses and secrets of the Trisoloid. The novel described the struggle and sacrifice of human beings on Earth, showing the tenacity and courage of human beings in the face of unknown dangers. At the same time, it also explored the fate of space civilizations and the meaning of human existence.